Reservoir for organs



Feb. 23, 1932. c. E. GRANT RESERVOIR FOR QRGANS Filed June 8, 1931 llllllvlllll :lllll ll I L/llll WOW Patented Feb. 23, 1932 UNITED STATES PATENT OFFICE RESERVOIR FOR OBGANS Application filed June 8, 1931.

This invention relates to a reservoir for reed and pipe organs one of the objects being to provide a pressure controlled reserve chamber for a reservoir whereby when an occasional sudden demand is made upon the reservoir, as by the abrupt playing of the great organ, the air will be supplied instantly and in ample quantities to the chests without a momentary diminution of pressure and consequent failure of tone, as might otherwise occur.

A further object is to provide a reservoir construction especially adapted for use in organs built to resist the action of fire and water, the major portions of the apparatus being formed of metal.

Another object is to provide a reservoir with a reserve whereby it is unnecessary to use the large amount of space heretofore required for a reservoir of sufficient capacity to meet the occasional excessive demands.

With the foregoing and other objects in View which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed may be made within the scope of what is claimed without departing from the spirit of the invention.

In the accompanying drawings the preferred form of the invention has been shown.

In said drawings:

Figure 1 is a view partly in section and partly in elevation of the apparatus constituting the prevent invention.

Figure 2 is an end elevation, the reservoir being shown in transverse section.

Referring to the figures by characters of reference, 1 designates a large box of sheet metal which can be supported on a floor F and has an inlet 2 for air directed thereto from the usual pump or blower. This box constitutes the main reservoir and is connected by a wind trunk 3 to a chest 4 having the usual valved outlets (not shown) leading to pipes 5.

The top of the reservoir 1 has an opening 6 in communication with a flexible air bag or Serial No. 542,947.

container 7 of rubberized fabric or other suitable material. This container rests upon and is secured to a pad 8 of felt or the like and is provided with a top covering 9 also of felt or other soft material. On this top covering or pad is secured a stiff plate 10 adapted to receive thrust from springs 11 which bear against a rigid overlying structure 12 and tend constantly to collapse the bag or container 7.

The reservoir is kept filled with air under pressure supplied through inlet 2 and this pressure is suflicient to fill the bag or container 7 and hold it distended against the action of springs 11. Thus a reserve supply of air under pressure is maintained in the container.

Under ordinary playing conditions the air is admitted in sufiicient quantities to the reservoir from its pump or blower to meet all of the demands of the pipes. However should there be any slight variations in the pressure the springs 11 would act to expel a sufficient amount of air from container 7 to the reservoir 1 to compensate for said variations.

Occasionally an excessive demand is made upon the air supply. This occurs. for example, when there is an. abrupt playing of the great organ. Under these con ditions un less a very large reservoir has been provided the tone will not be properly sustained but will fluctuate or fade. A sufficiently large reservoir requires a great amount of room which could be used advantageously for other purposes in the organ construction. It has been found that by providing a reservoir large enough to meet only the ordinary demands and equipping it with a reserve container for holding air under pressure. the occasional excessive requirements can be met adequately and a more compact organ can be built.

As the collapsible container is mounted between cushioning pads, it will not become quickly worn by distension and contraction but will be fully protected from contact with hard adjacent surfaces.

It is to be understood that the blower pipe leading to inlet 2 is to be equipped with the usual automatic control Valve connected in the ordinary manner by chain and pulleys to the plate 10. The structure is so well known that illustration thereof does not appear to be necessary. This valve is the means for holding the desired pressure in the reservoir.

What is claimed is:

1. In a pipe organ construction a reservoir having an inlet for air under pressure and an outlet, a flexible constantly opening into the reservoir, and pressure distributing means bearing on the bag. 7

2. In a pipe organ construction a reservoir comprising a box having an inlet for air under pressure and an outlet, a flexible bag opening at all times into the reservoir for holding a reserve air supply, a. pressure device, and means for distributing pressure from said device over the top of the bag to maintain a working air pressure in the reservoir when subjected to abrupt demands. v

3.In a pipe organ construction a reservoir comprising a box having an inlet for air underpressure and an outlet, a flexible bag opening at all times into the reservoir for holding a reserve air supply, and means for distributing pressure fromsaid device over the top of the bag to maintain a working air pressure in the reservoir when subjected to abrupt demands, said means including a plate, and a spring bearing on the plate. 7

4. In a pipe organ construction a reservoir comprising a boX having an inlet for air under pressure and an outlet, a flexible bag openingv at all times into the reservoir for holding a reserve air supply, and means for distributing pressure from said device over the top of the bag to maintain a working air pressure in thereservoir when subjected to abrupt demands, said means including a plate, and a spring bearing on the plate, a

cushion interposed between the plate and bag, and a cushion interposed between the bag and the reservoir. r

In testimony that I claim the foregoing as my own, I have hereto atfixed my signature.

CASPER ELDRED GRANT. 7 

